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ZX81 Power SupplyI have a ZX81 with the original 0.7A power supply. I know that this has trouble running many add-ons and was seeking advice on a suitable replacement…
... will do. Just ensure that the tip on the 3.5mm jack plug is ... the positive output connection. If you ... "9V" rated units).
The exact current rating is less ... is equal or greater than the required current. Sinclair specified 1 ... -
Early thoughts about creating a text adventureSo I always wanted to create my own ZX Spectrum text adventure. I tried looking at PAWs and GAC, but frankly I'm probably too stupid to use them. I…
... possible to develop the adventure on Windows and export ... t mind it working on the +3 only. A Z- ... usable memory so only the +3 can do that. ... /> (I've omitted the question about other programs because ... can already start designing the adventure on paper. Draw maps ... -
New multisystem floppy interface (spectrum 16Kb/+2A/CPC464)Dear all, I would like to show you my new extern floppy interface. Same interface can be used for both, CPC and Spectrum systems. CHARACTERISTICS …
... />
On the +3 there is a second reset pin on the edge connector ... which is the z80 NRST ... being one of the errors on the Amstrad schematic for the +3. I've ... have to trace the connections out on my +3 again some time ... -
New multisystem floppy interface (spectrum 16Kb/+2A/CPC464)Dear all, I would like to show you my new extern floppy interface. Same interface can be used for both, CPC and Spectrum systems. CHARACTERISTICS …
... the NRST to the Z80. (also fed to the RESET output on the ... upper side of the expansion port ... no effect on the operation of the speccy whatsoever the way it' ... so removing that resistor (R76 on the +3) should have no effect :)< ... -
Spectrum +2a memoryHi all, Happy New Year. A quick question, I have a Spectrum +2a that I am seeing a very intermittent fault, once every 20 - 30 power ups. I plug…
... /> Does anyone know which of the 4 IC's this would ... ? or is it spread over the 4 4164s?
[/QUOTE]
on the +3 family machines.
two ... chips for the contended pages and the other two for uncontended ... -
RGB video issue on +2 and +3. Signal high?I have a couple of +3's and a new +2a that arrived today. When I plugged in the +2a using my RGB lead from Retro Computer Shack I was reminded of a n…
... composite and RGB signals. The composite signal is fed to ... /> Not on the +3 family. They have a composite sync pin on the RGB socket ... straight from the gate array (and ... hasn't been connected to the blanking pin or something ... -
RGB video issue on +2 and +3. Signal high?I have a couple of +3's and a new +2a that arrived today. When I plugged in the +2a using my RGB lead from Retro Computer Shack I was reminded of a n…
... example the 12v pin on the RGB port on a stock +3.
The second ... . You could cut the trace between the two pins on the +3, or just replace ... R44 with zero ohms and move the ... -
Once again, fixing the +3 soundOne more question about fixing the distorted +3 sound. The longer you search the internet, the more suggestions you find. They?re all different, but,…
... of the table shows the name and value of the resistor in the +3, and the ... the +2B/+3B circuit.
The two rows showing a dash on the +3 ... column are the resistors that don't exist at all on the +3, against the ... -
Once again, fixing the +3 soundOne more question about fixing the distorted +3 sound. The longer you search the internet, the more suggestions you find. They?re all different, but,…
... R42 on the +3 is 2.2k, it changes to 1.2k on the +3B ... renamed R207 etc.
The 220 ohm resistor added between ... the emitter of TR5 and 0v is R206 on the +3B. On the last ... row of the table. -
Once again, fixing the +3 soundOne more question about fixing the distorted +3 sound. The longer you search the internet, the more suggestions you find. They?re all different, but,…
... revisions of the +3 motherboard have have the same resistors. The circuit was changed ... which aren't present on the +3 motherboards so you have to ... the table are where the value of the resistor changed from the +3 boards to the ... -
DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…
... sure it was the +3, as they were after the disk version. I ... have been tested on the +3 also.. does any of the loader code conflict ... ? or it's the actual machine (it's been ... -
DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…
... have been tested on the +3 also.. does any of the loader code conflict ... gameplay. On my +3 it's fine.
Load the same ... has corrupted sprites on the +2 but is fine on the +3. Again if you ... load it into the +2 via the tape ... -
Zx spectrum +3 disk driveCan some one tell me how too put a spectrum 3" disk drive onto a PC do you just plug it in and it will work and then how do you back up the disks tha…
... have any of the photos in the wayback machine.
on your PC to the 26 pin connector on the 3" drive ... IMPORTANT[/B][/U]: the power pins on the 3" drive are in ... a different order to on ... an adapter or rewiring the connector you'll ... -
The 20th comp.sys.sinclair Crap Games Competition thread!Hi all, [SIZE="7"][B][CENTER]ANNOUNCEMENT![/CENTER][/B][/SIZE] The comp.sys.sinclair Crap Games Competition 2015 is now well and truly OPEN! [url]…
[QUOTE=leespoons;820684]That's the sort of entry I like - ... works/fails on the +3, autoruns and was delivered in the post on punchtape (special ... -
Serial comms - duzzit work?Has anyone ever successfully got two 128K Speccies (of any variant) to communicate with each other over the SERIAL / RS232 / MIDI / AUX ports? I can'…
... QUOTE=joefish;821861]So do the +2 / +3 ROMs contain routines for ...
[QUOTE=joefish;821861]The disassembly of the 48K ROM is well ... Farrow has disassemblies of the 128k ROMs on his site [url] ... code is in ROM0 on the 128k, but ROM1 on the +3. If you don ... -
Spectrum +3 tape Loading !Hi all ! Wonder if anyone else has come across this. Ive recently bought a +3 from ebay. On the whole its fab. The disks work fine, the 128k tape g…
The tape input on the +3 is fine, you just need sufficient signal level.Admittedly that's quite a high level. Probably at least 2 Vp-p to be sure it's high enough. -
Gryzor box coversWould anyone happen to have or know where to see box scans of the Ocean-Imagine Helias version of Gryzor, as well as the disk release of it? Imagine …
Well if it didn't work on the +3, it probably also didn't work on the +2A and that would've been unacceptable for a Hit Squad release. -
Returning zx spectrum +3 owner - a few questionsHi everyone I'm a returning +3 owner, my spectrum has been dug out of the loft, not used since 1998. My setup was a +3 with a multiface 3 and a e…
... 3 and I may very well be confusing the ... a resistor to pull the logic gate to ground ... normal HD floppy drive on the +3 requires major surgery, ... only one of the incompatibility issues. The +3 is designed ... to use a shugart drive, as used on the ... -
New member searching for DIY informationHi everybody, I'm totally new on this forum, and in the Spectrum family. Usually i work with Amstrad computer and Atari also. I made various interf…
The +3 floppy interface type things are no use to you on a Grey ... +2 because the port decoding is ... done in the gate array on the +3/black +2. Also those ... machines have 4 16k ROMs where the ... -
What is the "SPECTRUM" keyword on a 128K?The 128K replaced UDG characters T and U with new commands; PLAY and SPECTRUM (or possibly the other way around.) The manual ([url="http://www.wor…
... the paging enabled IIRC.
The 48k ROM page on the ... 128k models is not absolutely identical to the ... original 48k ROM (particularly on the +3), which ... to 128k mode with the available commands, although ... -
What is the "SPECTRUM" keyword on a 128K?The 128K replaced UDG characters T and U with new commands; PLAY and SPECTRUM (or possibly the other way around.) The manual ([url="http://www.wor…
[quote="Battle Bunny;836167"]The 48k ROM page on the 128k models is not ... absolutely identical to the original ... 48k ROM (particularly on the +3), which causes some ... -
What is the "SPECTRUM" keyword on a 128K?The 128K replaced UDG characters T and U with new commands; PLAY and SPECTRUM (or possibly the other way around.) The manual ([url="http://www.wor…
... that it was actually possible, on the +3/+2A, to go into 48K ... BASIC with the SPECTRUM command, insert UDGs "T ... , then return to 128K using the aforementioned "USR 23354" and run ... the program with all 21 UDGs ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... holes are there on the PCB but only 3 of these are ... actually used or carried through on the outer case (the ... one on the more central position ... as a stand off on the 3 bolts actually carries through ... -
New Game - CR2: The EscapeHi, I'd just like to announce my new ZX Spectrum 48k title CR: The Escape, a platform game, which is available to download [url="http://stephennichol…
POKE 30894,0 for infy lives on the 3.3 version (no idea if that works on the older ones). :) -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... voltage stuff, like for use on the +3.3V, +5V and 12V supplies ... nice screw terminal block for the mains wiring. Then there ... earth wire to go to the PCB. I can do ... to take some photos of the existing mains wiring so ... I can check that the Discovery issue D is ... -
New Game - CR2: The EscapeHi, I'd just like to announce my new ZX Spectrum 48k title CR: The Escape, a platform game, which is available to download [url="http://stephennichol…
[quote="Lee Tonks;838318"]POKE 30894,0 for infy lives on the 3.3 version (no idea if that works on the older ones). :)[/quote]
Didn't know that one myself - thanks!
(I'll have to build cheats into the next game). -
Bomb Munchies - preview releaseBomb Munchies Preview release Version 12th Jan 2014 [URL=http://s979.photobucket.com/user/MatGubbins/media/bmsix_zpsc33279a2.gif.html][IMG]http://i…
... Kempston 31
Printing the correct numbers on screen = working
... USB joypads scattered around on the floor, it will ... I have the same problem with EmuZwin on the 3 PC that ... 3 joypad game available, with another on
the keyboard - providing the ... -
ZX Spectrum Reviews Website - major updateFinally got around to uploading a major update to the database tonight. The site now boasts not only every single Crash review but also every one fr…
... />
Just to clarify on the Your Sinclair reviews: All of ... . If anyone can help on the 3 outstanding YS reviews it would ... of the text is indecipherable from the quality of the page ... Licence to Kill - just the text from the pictures.
Issue 10 ... -
Why is RGB the best?Sorry, I know my question may sound odd but I have been doing some reading lately and this has struck me. This is what we know: RF -> CVBS -> …
... be 0, 2, or 3.
On the +3, Black +2 and Peritel ... +2 the RGB socket output is ... with the bright signal mixed into the colour giving three levels. On the toastracks ...
